Deep well pump



Nav. 30, 194g. c. A. NEELY 45,04

DEEP WELL PUMP Filed Dec. 4. 1944 2 She'e's-Sheet l ATINEV 30, 1948. c.A. NEELY DEEP WELL PUMP Filed Dec. 4, 1944 2 sheets-sheet 2 INVENTOR.

@mf/es eez/ Patented Nov. 30, 1948 Nirso STATES P GFI-ICE DEEP WELL rUMrApplication December 4, 1944, Serial No. 566,513

2 Claims. l

This invention relates to a deep well pump and an object of theinvention is to provide a pump that will operate with high efficiency inwells of great depth, such, for instance, as in oil wells.

In the operation of pumps of the reciprocating piston type at greatdepths, such as in oil wells 1 thousands of feet deep, it is desirableto provide.

for a relatively long piston stroke. In such wells the piston ispositioned near the bottom of the well and the pump rod for operatingthe piston, commonly called the "sucker rod, extends to the top of thewell. In such installations there is liable to be much lost motionbetween the piston and the means by which reciprocation is imparted tothe sucker rod. This lost motion is due partly to the stretch orelasticity of the sucker rod under the load and partly to a slightknuckling or dis-aligning action ofl said sucker rod on the down stroke,especially if the piston oiiers substantial resistance to downwardmovement.

An object of this invention is to provide novel and eiiicient link beltmeans for imparting an unusually long stroke to the upper end portion ofthe sucker rod so that a long piston stroke will be insured irrespectiveof lost motion in the rod.

Another object ls vto provide a deep well pump piston having eilicientsealing means that will prevent leakage between the cylinder wall andthe piston on the up stroke of the piston and that will be substantiallyfree from friction and will oiier substantially no resistance on thedown stroke of the piston, thereby minimizing the tendency for the pumprod to knuckle on the down stroke of the piston and further making itpossible to use a cable in place of usual sucker rod to reciprocate thepiston. The sections of the sucker rod ordinarily are connected togetherby the usual pipe couplings. ln the event the sucker rod is crooked ortends to buckle under down pressure or in theevent the pump tubing iscrooked or is inclined instead of being vertical then the couplings onthe pump rods will wear against the tubing and breakage of thesecouplings may occur. My invention overcomes this diilculty.

In the drawings Fig. 1 is a somewhat diagrammatic view partly in sectionand partly in elevation-showing my deep well pump installed in a well.

Fig. 2 is a plan view on broken line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional view, on a larger scale than thepreceding figures, showing the lower end portion of this pump includingparts of the pump cylinder, piston and valves.

Fig. 4 is a detached fragmentary view in elevation looking in thedirection of broken line 4 4 of Fig. 1 and showing link belt means whichposed within the casing i0.

I employ to secure a long stroke in a reciprocating type deep well pump.

Fig. 5 is a detached fragmentary sectional view showing an adjustablemounting means for a lower sprocket wheel.

Fig. 6 is a fragmentary sectional view taken on broken line 6 8 of Fig.1 and on a larger scale than Fig. 1 and showing mounting and drivingmeans for an upper sprocket wheel.

Fig. 7 is a fragmentary sectional view showing means for attaching aconnecting rod to two link belts.

Fig. 8 is a somewhat diagrammatic view partly in section and partly inelevation showing a form of my invention which uses a longcable insteadof pump rods to operate the pump piston.

Fig. 9 is a fragmentary detail of parts shown in Fig. 8.

Like reference numerals designate like parts throughout the severalviews.

In the drawings I0 designates fragments of the casing of an oil well.Oil wells are often several thousand feet deep and usually their casingswill be of larger diameter at the top than at the bottom, as shown. Asectional pump tubing is dis- A relatively long pump cylinder I2 ofslightly smaller diameter than tubing Il is provided at the lowermostend of the pump tubing II. Pump cylinder i2 is accurately machined onthe inside to cylindrical shape and has a reclprocable piston,designated generally by the numeral I3, disposed therein.

The lower end portion of the pump cylinder I2 has a closure member,preferably in the nature of a plug I4 threaded thereinto. The closuremember I4 is provided with a plurality of check valves I5, two of whichare shown in Fig. 3. The check valves IB admit liquid freely into thepump cylinder I2 but prevent the discharge of liquid therefrom. Anysuitable means, such as bars 9, l

may be provided to prevent permanent displacement of the valves I5 fromtheir seats. The piston I3 comprises a piston head I8 having checkvalves I1 provided therein to permit an upward but prevent a downwardflow of liquid therethrough. Cage means 8 prevents permanentdisplacement of the valves I'I. Theplston head IB is secured to a pumprod I8 made up of a plurality of sections. Preferably the lower endportion I9 ofthe pump rod I8 is threaded into the piston head i8.

The means for providing a liquid seal between the circumferential wallof the piston head I 6 and the inner wall of the pump cylinder I2comprises a cup shaped annular sealing member or washer having a fiatportion 20 and a cylindrical portion 2i. The flat portion 20 is securedto a yoke or spider 22 that is shaped somewhat like a spoked wheel. Thehub portion 23 of the yoke 22 is slidably and fioatingly mounted on asecdesde tion 24 of the pump rod I3 so that a limited amount of verticalmovement is provided for the nesting yoke 22 and sealing ring 20-2Icarried thereby.

The cylindrical sealing member 2I is of slightly tapered cross section,being thicker at the base than at the tip. Said member 2l is somewhatresilient and is positioned to extend between the periphery of thepiston head I3 and the inner wall of the pump cylinder I2. On the upwardstroke of the piston this sealing ring member 2l will nt snugly betweenthe piston head II and the wall of the pump cylinder I2 and preventleakage of liquid therebetween thus insuring the discharge of a maximumamount of liquid at each piston stroke. The instant the piston begins tomove downwardly in the pump cylinder I2 the sealing ring member 2li-2iwill lag, to the extent permitted by floating movement of the yokemember 22 on the piston rod section 24 and substantially all frictionbetween the piston I3 and the pump cylinder i2 will be relieved. Thisallows the piston I3 to be moved downwardly without resistance and thusminimizes knuckling and dis-alignment of the pump rods. As compared tothe commonly used pump leather of cup shape and to piston rings thissealing means offers much less friction on the down stroke of thepiston.

The tubular members II are enough larger than the pump cylinder I2 indiameter to allow easy insertion and withdrawal of the piston throughthe tubular members II. Preferably the top end portion of the pumpcylinder I2 is internally tapered or made of bell shape at I2 to obviateany danger of the sealing ring member 2l catching on the top end of thepump cylinder I2 when the piston I3 is lowered thereinto.

The upper end portion of the pump tubing II has an outlet conduit 25connected therewith and said pump tubing is provided with a cap member26. The pump rods I3 extend upwardly through a gland 21 in the capmember 23 and are connected by a pivot 28 with a connecting rod 2s. Theupper end portion of the connecting rod 29 is pivotally connected bycross bolt means 30 with two endless parallel link belts 3l and 32.Preferably a bushing 33 is provided on the-bolt 30, Y

as shown in Fig. '1. i

The link belts 3i and 32 are operatively disposed on lower sprocketwheels 34 and upper sprocket wheels 35.

The supporting means for the lower and upper sprocket wheels 34 and 35comprises two upright parallel channel bars 36 disposed in spaced apartrelation with their channel shaped sides toward each other, as shown inFigs. 1 and 2. Inclined leg members 31 are secured to the lower endportions of the channel bars 38% and rest on suitable supporting-means33 positioned on the ground. The upper end portions of the channel bars33 are secured to an overhead cap member 40. Preferably four leg members4I support the cap member 40 and rest on the supporting means 33.Preferably the cap member 4|! has a notch 42 extending from one sideinwardly, see Fig. 2, to facilitate handling of rods, such as the pumprods I3, which must be lowered into and hoisted out of the well.

The lower sprocket wheels 34, see Fig. 5, are rotatively mounted onbearing studs 43 that are rigidly secured to blocks 44. The blocks 44fit -within the channel bars 36 and are adjustably secured, as by capscrews 45 that may be inserted in any selected holes 46. To vary thelength of stroke of the pump piston I3 the blocks 44 are adjusted up ordown in the channel bars 36 and the number 4 of links in the link beltsII and 32 varied accordingly. Any desired amount of adjustment may beprovided in this way, depending on the number and spacing of the holes43.

The upper sprocket wheels 33 are each secured to n shaft 41. Each shaft41 is journaled in bearings 43, Fig. 1, 2, and 6. The shafts 41 aredriven by endless link belts 43- which pass around sprocket wheels 50 onthe shafts 41 and other sprocket wheels 5I on a driven shaft 52. Theshaft 62 is preferably driven by a motor 53 acting through speedreduction gear means in a housing 54 and through link belt means 55.

The pump r'o'ds I3 are tubular and to make it possible to discharge Jetsof light oil from the lower end portion of these pump rods to loosen upsand and the like that may collect in the lower end portion of the pumpcylinder I2 I preferably plug the bottom end portion of these rods andprovide jet openings from which jets of light oil under pressure may bedischarged. These jet openings are shown in Fig. 3 and numbered 53.

In the' structure shown in Fig. 8 the well casing I0, pump tubing II,pump cylinder I2, piston I3 and several other parts are similar to thosepreviously described and are correspondingly numbered. In the structureshown in Figs. 8 and 9 shown in Fig. 3 but may be made heavier in weightto assist downward movement by gravity if desired. The sealing ring 2|on this type of piston releases the instant the piston is free to movedownwardly thus making it both possible and practical to use a cable foroperating said piston.

Preferably ball and socket joint means 6I are used, Fig. 9, forconnecting the upper end of cable 30 to reciprocating means, as 32. Alsopreferably a derrick 32 is left over the well when a cable operated pumpis to be used for convenience in pulling and lowering the cable 60.Derrick 62 carries a head block 33 and a bull wheel or winding` drum 34.A short cable 3E is secured to the bull wheel 64 and passes over headblock 63 and thence downwardly. Socket means 66 on the lower end portionof cable 36 is provided for cou pling to the ball means on the upper endportion of the pump cable 63. Preferably wiper means for cable B0 isprovided at the top end of pump tubing II, see Fig. 9.

Also preferably the bull wheel 66 is driven from the same motor 53 thatoperates the pump and thus the need for an extra motor for pulling and-lowering the pump cable 30 is eliminated. I have shown the bull wheel64 connected with the motor 53 by a link belt connecting means 68, showndiagrammatically by dotted lines in Fig. B.

The use of the cable B0 in operating the pump saves a great deal of timeand labor in the event the piston I3 has to be raised out of the welland again lowered thereinto. Where the pump rods are used they must beuncoupled or coupled. one at a time, as the piston is raised or loweredand this takes a great deal Aof time. When the cable 30 is to be pulledout of the well said cable can be securely clamped at the top of thetubing I2, then unfastened from the link belt reciprocating means andconnected with the short cable 9B. Said cable 60 may then be unclampedand quickly and easily pulled out of the well and wound on the bullwheel 64. The operation of raising the cable out of the well may thus becontinuous. Said cable can be as quickly and easily lowered into thewell by winding it oil of the bull wheel 64.

The operation of the pump shown in Figs. 8 and 9 is similar to theoperation of the pump shown in Figs. l to 7 inclusive and hereinafterdescribed except that in the structure of Fig. 8 the piston I3 must movedown by gravity, as no thrust can be exerted on the cable 60. The use ofmy easily releasable sealing means 2| on piston I3 makes it practical tom-ove this piston down by gravity.

In the operation of this deep well pump the motor 53 will act throughtransmission 54, link belt means 55, shaft 52, link belt means 49 andshafts 41 to drive the two upright link belts 3| and 32 at the same rateof speed. The connecting rod 29, being pivotally connected with both ofthe link .belts 3| and 32 will be reciprocated or moved up and down bymovement of said link A belts. By this construction the lift will bebalanced and equally divided between the two link belts and a very longstroke may be imparted to the piston I 3 to pump liquid out ofthe well.

In instances where the pump rods I8 are several thousand feet long theremay be considerable lost motion in the pump rods due to the take up ofdis-aligned rods and due to stretching of the rods. Obviously lostmotion in the rods I8 lessens, by the amount of such lost motion, thedistance of travel of the piston I8 at each stroke and this lessens theamount of liquid discharged at each up stroke.

My piston seal means 2li- 2| reduces to a minimum friction between thepiston and the pump cylinder on the down stroke of the piston. Thisminimizes the tendency of the pump rods I8 to dis-align themselves andto lean over against the sides of the tubing i I, as sistance todownward movement by the piston will tend to compress the rods I8 andcause them to knuckle.

The use of the adjustable link belt means for reciprocating the pistonprovides for imparting any desiredl'engths of stroke to the piston I8irrespective of lost motion in the rods as the link 4 belts'fi and 82may be made long enough to take up -the lost motion and still give therequired piston stroke.

Obviously changes in the construction of my deep well pump may be madewithin the scope and spirit oi the following claims.

it will be obvious that l'emy f I claim:

1. In a deep well pump, a pump cylinder; a piston in said pump cylindercomprising a piston head loosely fitting said pump cylinder so as toleave an annular space between the piston head and the cylinder walls;piston rod means connected with said piston head; a yoke iloatinglymounted above said piston head and having a limited vertical movementtoward and away from said piston head; and. a cylindrical sealing ringcarried by said yoke movable into a sealing position in the spacebetween said piston head and said cylinder walls on the up stroke of thepiston head and movable into a released position relative to thecylinder walls on the down stroke of the piston head to relievefriction.

' 2. A deep well pump comprising a tubular conduit extending downwardlyinto a well; a pump cylinder connected with the lower end portion ofsaidconduit; a piston head in said pump cylinder loosely fitting saidcylinder to leave an annular space between the outer wall of said pistonand the inner wall of said pump/cylinder; piston operating meansconnected with said piston head and extending upwardly in said conduitto a point above the upper end of said conduit; a yoke iloatton.

C A. NEELY.

,REFERENCES CITED The following references are oi' record in the ille ofthis patent:

UNITED STATES PATENTS Number N Date g 803,152 Cole Oct. 31, 1905 828,624McIntire Aug. 14,-1908 1,021,298 Ault Mar. 26, 1912 1,447,931 DickensMar. 6, 1923 1,014,865v Boden Jan. 18, 1927 1,879,870 Fraser Sept. `37,1932 2,007,851

Enders July 4Il. 1995`

